Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Williston perceives a slight temperature ascent during April, with average high-temperatures adjusting from a warm 74.1°F (23.4°C) in March to a still moderately hot 80.6°F (27°C). An average low-temperature of 61.3°F (16.3°C) is recorded in the month of April.Heat index
The heat index for April is calculated to be 84.2°F (29°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.Heat index guidelines indicate values are for light wind scenarios and shaded regions. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Humidity
In April, the average relative humidity is 73%.Rainfall
In April, the rain falls for 8.3 days. Throughout April, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 127 rainfall days, and 10.04" (255mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
The average length of the day in April in Williston is 12h and 54min.On the first day of April, sunrise is at 7:18 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 8:05 pm EDT.
Sunshine
In Williston, the average sunshine in April is 9.2h.UV index
The average daily maximum UV index in April in Williston is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 6 in April leads to these recommendations:
Ward off overexposure. Defence against solar harm is crucial. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Williston?
What is the average humidity in April?
How many days does it rain in April?
When it does not snow?
How many hours of daylight does Williston have in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Williston have in April?
What is the UV index intensity in April?
Average temperature in April
Williston, FL
- Average high temperature in April: 80.6°F
The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is January (64.9°F).
- Average low temperature in April: 61.3°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).
Average pressure in April
Williston, FL
- Average pressure in April: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in April
Williston, FL
- Average wind speed in April: 7mph
The windiest months (with the highest average wind speed) are March and April (7mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).
Average humidity in April
Williston, FL
- Average humidity in April: 73%
The months with the highest relative humidity are July, August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in April
Williston, FL
- Average rainfall in April: 0.71"
The wettest month (with the highest rainfall) is July (1.73").
The driest month (with the least rainfall) is March (0.28").
Average rainfall days in April
Williston, FL
- Average rainfall days in April: 8.3 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (5.1 days).
Average snowfall days in April
Williston, FL
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in April /
Average sunshine in April
Williston, FL
- Average daylight in April: 12h and 5min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in April: 9h and 1min
The months with the most sunshine are May and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in April
Williston, FL
- Average sunshine days in April: 20.7 days
The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in April
Williston, FL
- Average UV index in April: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in April
Williston, FL
- Average cloud cover in April: 30
The months with the most cloud cover are February and December (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 28).
Average visibility in April
Williston, FL
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Williston, Florida, USA
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